I/We use one of the local generic varieties (of which I tried several
before getting one I considered useable); but it's clay based so
non-flushable (scratches the hell out of porcelain).

Per tracking, perhaps a piece of carpet in front of the litterbox will
get your cat to wipe his/her paws.

I keep trying to get up enough nerve to find a store that sells the more
organic types (wood based) but haven't yet.

pat

I am (and so you should you) most worried about #3,
I dont want to inhale anything harmful.
Then #5.

I'm testing Tidy Cats Crystal Blend, the particles are
large and hopefully will not produce dust.

I'm using Swheatscoop ( www.swheatscoop.com ), which fully meets the first
two, and is much lower in dust and tracking than many I've tried. Tracking
is a major problem here, and while it isn't as bad as with other products,
it's still present. However, since this is a processed granular product made
from wheat chaff and stalks, it cleans up more easily. No added deodorants,
but since the wheat base absorbs much better than clay, odor isn't a major
issue as long as you keep the box turned/cleaned. It's available at many of
the pet store chains, and at many of the groceries. I've also heard that a
product called Ultimate Cat Litter is "out there" and supposed to be good,
but haven't found it locally.

World's Best meets all your (and my) requirements. I've been using it
for several years now in 10-15 boxes. Sweat Scoop isn't bad but it
didn't meet my no-dust requirement.

Thanks so much for all the helpful responses, everybody.  I checked
out Swheat Scoop's and World's Best Cat Litter's websites, and they
both look like fantastic products.  They also both look extremely
expensive, from the price searches I ran!  I will continue to give
those two serious consideration (and probably try them both out), but
in the meantime if anybody can recommend any cheaper alternatives to
consider as well (even if they don't necessarily meet all 5 of my
criteria), I'd love to hear your thoughts.

Lothar

Well, after hearing all your recommendations, I went out yesterday and
bought a big bag of Swheat Scoop litter.  I'm going to give it a
little more of a chance before I pass final judgement, but so far I am
unimpressed with it.  It does seem to clump adequately, but it is very
hard to sift because of the large grain size (maybe a just need a
sieve with larger slits than the ones they typically sell in pet
stores).  

My main complaint though is the smell of the stuff.  It has a very
strong wheat smell, and now my entire cat smells strongly of wheat, as
well as the room that the litterbox is in.  I never thought of wheat
as having an especially strong smell before, but I guess it does!  My
cat smells rather like a barn to me now.  The stuff does also kick up
dust when I scoop it, so in that regard it seems no better to me than
the clay litter I had been using.

I'll consider trying the World's Best Cat Litter next, but can anybody
tell me if I am going to experience similar issues with it?  For what
that stuff costs, it's going to have to really be the best litter in
the world for me to be happy with it.  :-)

Thanks again for everybody's opinions!

Lothar